Polar Earth Orbits (PEO)

Ilcev, St. D.

doi:10.1109/crmico.2010.5632692

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…3) Inclination: a) Inclined orbits: a1) Polar Orbits [20]: In a strict-sense definition, the orbital inclination angle is ± 90 • (i.e., the satellites travels around the Earth from pole to pole). However, according to the European Space Agency (ESA), also angles close to 90 • are referred to as polar (e.g., Iridium LEO satellites, with inclinations of 86.4 • are considered as having polar orbits).…”

Section: A Orbit Typementioning

confidence: 99%

A Feasibility Study for Signal-in-Space Design for LEO-PNT Solutions With Miniaturized Satellites

Ferre

Praks

Lohan

2022

IEEE J. Miniat. Air Space Syst.

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The global navigation satellite systems (GNSSs) are increasingly suffering from interferences, such as coming from jammers and spoofers, and their performance is still modest in challenging urban and indoor scenarios. Therefore, there are efforts worldwide to develop complementary positioning, navigation, and timing (PNT) solutions. One such complementary method under current research is the so-called LEO-PNT, namely, PNT solutions based on low-Earth orbit (LEO) satellites, and in particular on small-sized or miniaturized satellites. Such satellites have low-to-moderate costs of building, launching, and maintenance. Several challenges are to be overcome when designing a new LEO-PNT solution, concerning all three satellite segments: 1) the signal-in-space (SIS) or space segment; 2) the ground segment; and 3) the user/receiver segment. This article presents a survey of the SIS design challenges under the inherent constraints of wireless-channel propagation impairments as well as some design recommendations for SIS features. We address different constellation types, achievable coverage limits, and geometric dilution of precision (GDOP) bounds, as well as achievable carrier-to-noise ratios (CNRs) under a realistic wireless channel model, based on a MATLAB Quadriga simulator. We also discuss several optimization criteria regarding LEO-PNT SIS design, by taking into account the tradeoff between a low cost/low number of satellites in orbit on the one hand, and a sufficient coverage and good CNR for PNT purposes on the other hand.

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Section: A Orbit Typementioning

confidence: 99%

A Feasibility Study for Signal-in-Space Design for LEO-PNT Solutions With Miniaturized Satellites

Ferre

Praks

Lohan

2022

IEEE J. Miniat. Air Space Syst.

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“…Other possible orbits for total polar coverage can be an inclined Highly Elliptical Orbit (HEO) of Russian Molnya constellation of 4 satellites; GIO (Geosynchronous Inclined Orbit) at 45 o inclined plane of 4 satellites and 55 o inclined circular MEO at 20,000 km altitude for both the US GPS and Russian GLONASS military Global Satellite Navigation Systems (GNSS) [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Introduction to polar earth orbits (PEO) in the function of the satellite distress and safety systems (SDSS)

Ilčev¹

2020

IJEECS

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<p align="LEFT">In this paper is described introduction of Polar Earth Orbits (PEO) in the function of the Satellite Distress and Safety Systems (SDSS) for all mobile applications. The results of a technical and economic study regarding the extension of the Inmarsat Geostationary Earth Orbit (GEO) satellite system to cover polar region are reviewed. In addition, also are examined the technical and practical aspects of providing an operational polar Mobile Satellite Service (MSS) for the provision of combined distress and safety communication solutions in conjunction with a commercial and defense communication systems for maritime, land and aeronautical applications. This study is considered several PEO satellite models and their probable costs for Search and Rescue (SAR) and determination MSS solutions. The practical usage of Low PEO constellation is realized by Cospas-Sarsat international project for SDSS.</p>

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Polar Earth Orbits (PEO)

Cited by 2 publications

References 3 publications

A Feasibility Study for Signal-in-Space Design for LEO-PNT Solutions With Miniaturized Satellites

A Feasibility Study for Signal-in-Space Design for LEO-PNT Solutions With Miniaturized Satellites

Introduction to polar earth orbits (PEO) in the function of the satellite distress and safety systems (SDSS)

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